Elbow-terminal for ventilation-piping.



PTENTED MAY 30, 1905.

z SHEETS-SHEET 1.

No@ 791,397. l

D. I'. ASBURY. ELBOW TERMINAL POR VENTILATION PIPING.

APPLICATION FILED umso. 1904. v

@d TN 110.791.097. PATENTED MAY 30, 1905.

D. I'. ASBURY.

ELBOW TERMINAL FOR VENTILATION PIPING.

. APPLIOATION FILED JAN. s0. 1004.

2 SHEETS-SHEET a.

/Qw/v@ l Afww.

' UNITED STATES Patented May 30, 1905.

PATENT CEEICE.

DORSEY F. ASBURY, OF SEATTLE, WASHINGTON.

ELBOW-TERMINAL FOR VENTILATION-PIPING.

SPECIFICATION forming part of Letters Patent No. 791,397, dated May 30, 1905.

Application tiled January 30, 1904. Serial No 191,335.

To rar/ZZ whom, it 71cm/ concern,.-

Be it known that I, DoRsEY F.y ASBURY, a citizen of the United States, residing at Seattle, inthe county of King and State of Washington,l have'invented new and useful Improvements in Elbow-Terminals for Ventilation- Fip'ing, of which the following is a specification.

This invention relates to terminals for ventilating-pipes.

The object of the invention is in a ready, certain, and effective manner to effect ventilation of an apartment of any character without discomfort to the occupants, as from the presence of an objectionable draft; to direct the current of air in any desired direction, either vertically, horizontally, or at an upward or downward angle; in apositive manner to pre-- vent bafliing or choking of the air within the terminahwith attendingdiminution in its force of projection; to effect rapid adjustment and positive holding ofthe terminal in any desired adjustment to cause projection of the air-current in the desired direction, and, generally, to simplify the construction and render more eliicient in use devices of this character.

With the above and other objects in view, as will appear as the nature of the invention is better understood, the same consists, generally stated, in a terminal for Ventilatingpipes, comprising a plurality of curved tele'- scopic sections provided with means for adjusting the discharge or outlet portion of the terminal at any desired angle, together with a novel arrangement of mechanism for permitting rotation of the terminal about a horizontal or other axis. As generally constructed the inlet-pipeto which the terminal is secured will be arranged vertically, and it is therefore essential that suitable means should be 'provided to permit of the terminal being swung around the pipe with readiness and ease and, without danger of binding, to effect assemblage between the inlet-pipe and the terminal as to preclude possibility of accidental separation in use. This feature is also essential irrespective of the disposition of the inlet-pipe, as in some instances the latter may be disposed in a horizontal instead of avertiparts assembled and to permit rotation of the terminal with relation to the inlet-pipe; In the simpler form of the embodiment of the invention this assembling means may consist of a plurality of screws or studs carried bythe collarand engaging a peripheral groove or guide formed in the lower portion of the terminal, and this form will be thoroughly eective where the terminal is of small size, but where of large size, which might render the easy turning of the terminal somewhat difhcult, antifriction-bearings. preferably in the nature of balls, are disposed between the housed end of the terminal and the collar, and as a matter of further specilic improvement it is designed that the antifriction-bearings shall constitute a locking means for holding the end of the terminal combined with the collar. To effect this result, the collar is provided on its inner side or surface with a race semicircular in crosssection and with a lateral opening, andthe outer side of the'lower end of the terminal is provided with asimilar race alining with that in the collar and forming therewith a race circular in cross-section, and into the race thus formed antifriction-bearings, preferably in the nature' of balls, are placed through the opening in the collar, after which the said opening is closed. It will be seen from this arrangement that the inlet-pipe and terminal direct proportion to the decrease in the vev locity of the air, and by this simple expedient it will be seen that the same volume of air IOO will escape from the terminal as would from the pipe were there no terminal connected to said pipe.

. Further and more specific details of construction and advantages accruing fromjthe the same into effect, it being understood that' the elements therein exhibited may be varied or changed as to shape, proportion, and exact manner of assemblage without departing from the' spirit thereof.

In the drawings, Figure 1 is a view in elevation, partly in section, exhibiting a preferred form of' the invention, various adjustments of the devicev being indicated by dotted lines. Fig. 2 is a detail view of an adjusting device for 'holding one section of the terminal in any fixed position with relation to the other; Fig. 3 is a'detail view of a valve-locking device'. Fig. 4 is a sectional detail view of a modifiedform of connection between the terminal and the inlet-pipe.

Referring-to the drawings and to Fig. 1 thereof, 1 designates the inlet-pipe, which may lead to any suitablel point of supply and may bev disposed within a'room or any otherv apartment or place to be ventilated. As herein shown, the pipe is disposed in a vertical position; but it is to be understood that, if preferred, it may be arranged in ahorizontal position without departingffrom' the scope of the invention, and as this willbe' readily understoo'd detailed illustration thereof isdeemed unnecessary. The upper end of the inletpipe hasfcombined with it a collar or castingy 2, which-may beI shrunk or riveted or otherwise secured to the pipe, the upper end of the collar being-of greater diameter than the pipe topresent aseat 3, the function of which will presently appear.

The terminal comprises two curved sections 4 and 5, each of these sections being in this instance segments of ninety degrees of a circle, by which arrangement when the inletpipe is disposed vertically the discharge end of theA section may be disposed to discharge downwardly in a line parallel with the inletpipe; but where the inlet-pipe is disposed on a horizontal plane to secure this discharge the sections will have to be of segments of fortyfive degrees of a circle. Thesections 4 and 5 are by preference made of cast-iron, although they may be of any other suitable material or otherwise constructed, and the section 4 is provided ad jacent to its lower end with a circular iiange or rib 6, provided with a peripheral groove 7, to be engaged by the inner ends of screws or pins 8, carried bythe upper portion of the collar, the coaction between the screws or pinsbeingsuch as to permit ready rotation of the'terminal without danger of accidental separation from any cause. As shown in Fig. 1, the lower end of the section 4 rests upon the upper end of the inlet-pipe; but this is not essential, as it may terminate short of the pipe.

As above stated, it is essential to the production of a 'thoroughly eiiicient device of this character that bafiiing or choking of the air within the terminal be obviated in order that the velocity of discharge may not be impeded, and to eiect this discharge the internal diameter of the terminal, by which is meant the sections 4 and 5, gradually increases from a point adjacent to the` lower housed end of the terminal to a point adjacent to the discharge end thereof, the external diameter of the section 4 remaining-the same in order to permit telescopic action, as indicated by dotted lines in Fig. 1. Asa general proposition it may be stated that the internal diameter of the section 4 from the pointV to the point X will increase in the proportion of ten per cent. and the internal diameter of the section 5 from the point Y'to the point Z will increase in-like proportion; butit is to be understood that this stated increase is not to be construed as being the only one that could be employed, as it may be increased or diminished `if found necessary or desirable.

Combined with 'theouter or discharge end ofthe section 5 in anyisuitable manner, either rigidly or detachably, is a'iared onbell mouth 9, the free end of which is provided with a iiange 10, to be engaged by an overturnei'l ring 11, which serves to hold a screen l2 in position, the function of the' screen, as will be understood, being to prevent the admission of extraneous material to the terminal or `the discharge .therefrom of dust, dirt, or the like.

It is designed that the sections 4 and 5 shallv be so constructed that while perniitting ready telescopic'movementffor the purpose of various adjustments, the escape of air at the point of juncture between two sections will be precluded, and for this purpose-the external of the portions will be properly dressed or iinished to secure this result.

The means herein'shown for effecting adjustment of the Section5 with relation tothe section 4 and for holding it in its adjusted position comprises a downward-projccting arm 13, carried by the section 5, and an uj'iwardprojecting arm 14, carried by the section 4, the end of each of the arms terminating in a boss 15 and 16, respectively, the opposed faces of which are serrated or toothed to ell`ect positive locking between them. '.lo clamp the bosses together, thus to hold the sectionl 5 in its adjusted position, a locking-screw 17 is provided, which is threaded in the arm 14 and has a shoulder 18 bearing upon thc outer side of the arm 13. 1t will be seen that lOO llO

by loosening the locking-screw the opposed faces of the bosses will be freed from engagement with each other, so that adjustment of the section 4may be secured, lwhereupon when the locking-screw is again operated to clamp the bosses together the section 5will be positively held against dropping. To relieve the bosses and arms from undue strain, due to the weight of the section 5, and also to prevent any possibility of accidental separation of the section l5 from the section 4 in the event that the locking-screw be not tightened, the arm 13 is provided with a lug or `boss 19, which is adapted to abut a similar l'ug or boss on the arm 14. Should it be desired to detach the section 5 from the section 4 for any purpose, the locking-screw will be removed from the bosses, thereby leaving the-latter free for separation from each other, and by giving the section 5 a slight turn the lugs or bosses 19 and 20 will be moved out of engagement with each other, so that the separation of the sections may be secured. v

In devices of this character it is of course essential that suitable means be provided for regulating the passage of air therethrough,

.and to effect this result an ordinary valve 21 of disk type is employed, said valve being secured to journals 22 and 23, the former of which-has its ends seated in a bearing 24 on the inner wall of the section 4, and the latter working in a bearing 25, formed in lthe .opposite side of the said section. The outer end of the journal 23 is provided with a handhold 26, by which the Valve maybeturned. To hold the valve at any desired adjustment within the section 4, a locking device is employed, which in this instance consists of a spring 27 one end of which is secured in the' journal 23, thence bent upon a cur-ve and projected upward through a slot 28 in the said journal, the free end of the spring being adapted to traverse a rack-plate 29, projecting from one' side of the section 4. The coaction between the spring and rack-plate may be such that'when sufficienty torsional strain is applied to the handhold the spring will be forced out from the teeth of the rack-plate, or, if preferred, the coaction between these parts may be such that it may be necessary to move the spring out of engagement with the rack-plate before the valve may be turned.

-In the form of embodiment of the invention shown in Fig. 4 antifriction-bearings() are provided between the lower end of the section 4 and the collar 2, the screws or pins of course in this instance being dispensed with. The latter being the fact, it is-essential that the disposition of the ball-bearings be suchthat in addition to their usual function they will constitute a means of holding the terminal positively assembled with the inlet-pipe. To effect this result, the inner face of the upper portion of the collar is provided with a racel, which is semicircular in sired. adopted, the terminal may be employed 1n cross-section,`and the flange or rib 6 of the section 4 is provided with a similar race, the two races, when the terminal is in position, presenting a race circular in cross-section, and in this race the bearings 3() are disposed. The collar is provided on one side with an opening 32, through which the bearings are supplied to the race, the opening being normallj7 closed bya plug 33, which may have a threaded or other engagement with the collar to hold it in position, the inner end vof the closure when a plug being concaved to conform to the periphery of the bearings and to constitute an unbroken continuation of the race. It will he noted by Fig. 4 that the bearings 30 span the point of juncture between the section 4 and the collar, and thereby present a positive lock to prevent accidental disconnection of the parts in use.

While the device of this invention is described as being adapted more particularly for Ventilating purposes, it is to be under-y stood that it may be used for conveying liquids, as if the jointsbetween the parts are packed this result may be secured.

If preferred or found necessary, additional sections of'pipe, either flexible or otherwise,- may be secured to the section 5 and. be carried to any point of the room or closure de- When the latter arrangement is connection with a cotton-gin, linting-machine, or sawmill.

It will be seen from the foregoing description that in the device disclosed provision is -made to meet every emergency that will be required in a thoroughly-effective device of this character and, further, that the simplicity of construction of the parts is such that danger of derangement in use is reduced to a minimum and facility of repairs when needed is secured.

Having thus described the invention, what is claimed is,-

1. A structure of the class described involving a plurality of curved tubular telescopically-associated members of progressively-increasing internal diameter from one end toward the other end thereof. .v

2. In a structure of the class described, the combination of a pipe, and a plurality of curved tubular te'lescopically-associated memi bers of progressively-increasing sectional area from the pipe to the atmospheric end thereof, one of said members being rotatively associated with said pipe.

3. A structure of the class described involving a-plurality of curved tubular telescopically-associated members of progressively-increasing sectional area from one end toward the other end thereof, the terminal portion-of the outer member being of ared form.

4. A structurev of the class described involving a plurality of curved tubular telescopically-associated members of progressively-in- IOO IBO

creasing internal diameter from one end to- Ward the other end thereof, an arm carried by each member, a serrated boss on each arm, the serrated faces of the bosses being opposed, and means, constituting the center of the curved members, for clamping the bosses together.

5. A structure of the class described, comprising a plurality of curved telescopic sections, means for locking one section at the desired adjustment with relation to the other section, and stops carried by the locking means for preventing disconnection of the sections.

6. In a structure of the class described, a plurality of telescopic sections, one of which is provided with a rack-plate, aval ve arranged in one of the sections and provided with a portion projecting outside of said-section, the projecting portion being slotted, and a bent spring fitted Within the slot of said projecting portion, one branch of the spring being fastened to said projecting portion and the other branch thereof being arranged to traverse the rack-plate.

7. A structure of the class described involving a plurality of curved tubular telescopically-associated members of progressively-increasing internal diameter from one end to- Ward the other end thereof, the terminal portion of the outer member being provided with a screen.

8. A structure ofthe lclass described involving a plurality of curved tubular telescopically-associated members of progressively-increasing internal diameter from one end toward the other end thereof, the external dameter of the inner member being uniform throughout the length thereof.

9. ln a structure of the class described, the combination of a pipe, a plurality of curved tubular telescopically-associated members of progressively-increasing diameter from the pipe to the atmospheric end thereof, one of said members being rotatively associated with said pipe, a manually-operable damper for controlling the flow of air through said members, and means for locking the latter in adjusted relations.

In testimony whereof l. have hereunto set my hand in presence of two subscribing witnesses.

DORSEY F. ASBURY.

Witnesses:

L. A. OAiins, CHAs. W. CULVER. 

